c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 02:27:36 +03:00
Code Issues Packages Projects Releases Wiki Activity

Illumos 5243 - zdb -b could be much faster

Browse Source 
5243 zdb -b could be much faster
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Dan McDonald <danmcd@omniti.com>

References:
  https://www.illumos.org/issues/5243
  https://github.com/illumos/illumos-gate/commit/f7950bf

Ported-by: Don Brady <don.brady@intel.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3414
This commit is contained in:
Matthew Ahrens
2015-05-14 17:41:29 -06:00
committed by Brian Behlendorf
parent b1b85c8772
commit e5fd1dd682
2 changed files with 47 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/dmu_traverse.c
+22 -19
View File
@@ -58,6 +58,7 @@ typedef struct traverse_data {
int td_flags;
prefetch_data_t *td_pfd;
boolean_t td_paused;
uint64_t td_hole_birth_enabled_txg;
blkptr_cb_t *td_func;
void *td_arg;
} traverse_data_t;
@@ -226,25 +227,20 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
}
if (bp->blk_birth == 0) {
if (spa_feature_is_active(td->td_spa, SPA_FEATURE_HOLE_BIRTH)) {
/*
* Since this block has a birth time of 0 it must be a
* hole created before the SPA_FEATURE_HOLE_BIRTH
* feature was enabled. If SPA_FEATURE_HOLE_BIRTH
* was enabled before the min_txg for this traveral we
* know the hole must have been created before the
* min_txg for this traveral, so we can skip it. If
* SPA_FEATURE_HOLE_BIRTH was enabled after the min_txg
* for this traveral we cannot tell if the hole was
* created before or after the min_txg for this
* traversal, so we cannot skip it.
*/
uint64_t hole_birth_enabled_txg;
VERIFY(spa_feature_enabled_txg(td->td_spa,
SPA_FEATURE_HOLE_BIRTH, &hole_birth_enabled_txg));
if (hole_birth_enabled_txg < td->td_min_txg)
return (0);
}
/*
* Since this block has a birth time of 0 it must be a
* hole created before the SPA_FEATURE_HOLE_BIRTH
* feature was enabled. If SPA_FEATURE_HOLE_BIRTH
* was enabled before the min_txg for this traveral we
* know the hole must have been created before the
* min_txg for this traveral, so we can skip it. If
* SPA_FEATURE_HOLE_BIRTH was enabled after the min_txg
* for this traveral we cannot tell if the hole was
* created before or after the min_txg for this
* traversal, so we cannot skip it.
*/
if (td->td_hole_birth_enabled_txg < td->td_min_txg)
return (0);
} else if (bp->blk_birth <= td->td_min_txg) {
return (0);
}
@@ -533,6 +529,13 @@ traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp,
td->td_flags = flags;
td->td_paused = B_FALSE;
if (spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) {
VERIFY(spa_feature_enabled_txg(spa,
SPA_FEATURE_HOLE_BIRTH, &td->td_hole_birth_enabled_txg));
} else {
td->td_hole_birth_enabled_txg = 0;
}
pd->pd_flags = flags;
mutex_init(&pd->pd_mtx, NULL, MUTEX_DEFAULT, NULL);
cv_init(&pd->pd_cv, NULL, CV_DEFAULT, NULL);